User`s manual

TransType Pro
58
If you select the Use Default item TransType will refer to the codepage
selected as the default in the Defaults/Codepages & Scripts Page of
the Preferences dialog:
If you select Use Names (the default option for the source encoding pop-
up menu) TransType will try to convert character names to Unicode
indexes and later apply Unicode-based reencoding algorithms. We
recommend that you always use the names-Unicode method unless you
know that the source font has symbol or simulated encoding, in which case
you will manually select a codepage from the codepages list. Remember
that you may use the font preview feature to look at the encoding.
As in TrueType, after you define the source codepage you should select a
destination codepage to completely define the reencoding process.
All the characters now have some Unicode index assigned, so you can
follow the same process described in the TrueType section.